On 19/05/2010, at 23:44, Ben Millwood wrote:
> On Wed, May 19, 2010 at 10:57 AM, Serguey Zefirov wrote:
>>
>> PS
>> Rationals:
>> Prelude> [1,1+2/3..10] :: [Rational]
>> [1 % 1,5 % 3,7 % 3,3 % 1,11 % 3,13 % 3,5 % 1,17 % 3,19 % 3,7 % 1,23 %
>> 3,25 % 3,9 % 1,29 % 3,31 % 3]
>>
>> Same result.
>
* Ben Millwood wrote:
>> Prelude> [1,1+2/3..10] :: [Rational]
>> [1 % 1,5 % 3,7 % 3,3 % 1,11 % 3,13 % 3,5 % 1,17 % 3,19 % 3,7 % 1,23 %
>> 3,25 % 3,9 % 1,29 % 3,31 % 3]
>>
>> Same result.
>
> This sounds like a bug to me. The section of the Haskell Report that
> deals with the Enum class mentions Fl
On Wed, May 19, 2010 at 10:57 AM, Serguey Zefirov wrote:
>
> PS
> Rationals:
> Prelude> [1,1+2/3..10] :: [Rational]
> [1 % 1,5 % 3,7 % 3,3 % 1,11 % 3,13 % 3,5 % 1,17 % 3,19 % 3,7 % 1,23 %
> 3,25 % 3,9 % 1,29 % 3,31 % 3]
>
> Same result.
This sounds like a bug to me. The section of the Haskell Rep
On 19/05/2010, at 20:36, Ivan Lazar Miljenovic wrote:
> Roman Leshchinskiy writes:
>> Personally, I consider the Enum class itself to be broken.
>
> Oh? In what sense?
Firstly, the enumFrom* family of functions shouldn't be methods and the class
itself should provide enough facilities for imp
Roman Leshchinskiy writes:
> Personally, I consider the Enum class itself to be broken.
Oh? In what sense?
It seems to work fine for data types representing bounded enumerable
values with a proper mapping to/from Int (it's not bijective since
there's no proper mapping from Int -> Bool for examp
On 19/05/2010, at 19:24, Dmitry Olshansky wrote:
> Prelude> [1,1+2/3..10]
> [1.0,1.6665,2.333,2.9996,3.666,4.332,4.998,5.664,6.33,6.9964,7.6625,8.329,8.99
Thanks, it's clear now.
2010/5/19 Serguey Zefirov :
> 2010/5/19 Erik de Castro Lopo :
>> Dmitry Olshansky wrote:
>>
>>> It seems that I saw something like this in Cafe recevtly. But I am not
>>> sure...
>>> In GHC 6.12.1 (Platform 2010 on Windows Vista) I have
>>
>>
>>
>>
>>> Any comments?
>>
>>
But
Prelude Data.List> [1,1+2/3..4] :: [Double]
[1.0,1.6665,2.333,2.9996,3.666,4.332]
Prelude Data.List> unfoldr (\n -> let n'=n+2/3 in if n' <= 4 then Just
(n',n') else Nothing) 1 :: [Double]
[1.6665,2.333,2.
Ivan Lazar Miljenovic writes:
> Dmitry Olshansky writes:
>
>> Hello all,
>>
>> It seems that I saw something like this in Cafe recevtly. But I am not
>> sure...
>> In GHC 6.12.1 (Platform 2010 on Windows Vista) I have
>>
>> Prelude> [1,1+2/3..10]
>> [1.0,1.6665,2.333,2.9
2010/5/19 Erik de Castro Lopo :
> Dmitry Olshansky wrote:
>
>> It seems that I saw something like this in Cafe recevtly. But I am not
>> sure...
>> In GHC 6.12.1 (Platform 2010 on Windows Vista) I have
>
>
>
>
>> Any comments?
>
> The problem you point out is not a problem with Haskell, but a pro
Dmitry Olshansky writes:
> Hello all,
>
> It seems that I saw something like this in Cafe recevtly. But I am not sure...
> In GHC 6.12.1 (Platform 2010 on Windows Vista) I have
>
> Prelude> [1,1+2/3..10]
> [1.0,1.6665,2.333,2.9996,3.666,4.33
Dmitry Olshansky wrote:
> It seems that I saw something like this in Cafe recevtly. But I am not sure...
> In GHC 6.12.1 (Platform 2010 on Windows Vista) I have
> Any comments?
The problem you point out is not a problem with Haskell, but a problem
with the whole concept of floating point arit
Hello all,
It seems that I saw something like this in Cafe recevtly. But I am not sure...
In GHC 6.12.1 (Platform 2010 on Windows Vista) I have
Prelude> [1,1+2/3..10]
[1.0,1.6665,2.333,2.9996,3.666,4.332,4.998,5.6
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